Lynch played Victor on Backstage Wife,[2]: 28  Buck on Portia Faces Life,[2]: 243  and Slim Stark on A Woman of America.

Some of the other series in which Lynch appeared are Peter Gunn, Zorro, Have Gun - Will Travel ("Love of a Bad Woman"), Gunsmoke (“Bureaucrat” & “The Patsy”), Checkmate ("Cyanide Touch"), woman"), Checkmate ("Born To Hang"), The Asphalt Jungle, Straightaway, The Honeymooners, The Fugitive, The Andy Griffith Show, The Dick Van Dyke Show, Blue Light, Adam-12, Star Trek ("The Devil in the Dark") Season 1, Episode 25 as Chief Engineer Vanderberg in 1967, Maverick, All In The Family (in the famous episode, "Archie and the Lockup", where he played Guard Callaghan), The Twilight Zone ("Mr. Denton on Doomsday"), The Rifleman, and The Wild Wild West.

Among the feature films in which he appeared are I Married a Monster from Outer Space, North By Northwest, The Lawbreakers, Pork Chop Hill, Anatomy of a Murder and Tora!

Lynch's last credited performance was in the role of Rear Admiral Talbot Gray in the 1983 seven-part miniseries The Winds of War.

"[9] With such income uncertainty in mind as he grew older, Lynch bought a flower shop in North Hollywood a "few years" before the noted interview.

He began studying floriculture, taking courses in the art of floral arranging and design, and then providing flowers for local weddings, receptions, and other events.

According to Lynch, his many years of experience performing on decorated sets for movies and television series proved to be a benefit to him in his new business.